/* Reset dasar */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  scroll-behavior: smooth;
}

body {
  background-color: #f5f8fa;
  color: #333;
  line-height: 1.6;
}

header.navbar {
  background-color: #1565c0;
  color: white;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  box-shadow: 0 3px 6px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.nav-left {
 .nav-left {
  display: flex;
  align-items: center;
  gap: 15px;
  flex-wrap: wrap;
}

.dosen-name,
.instagram {
  font-size: 0.9rem;
  font-style: italic;
  color: #e3f2fd;
  margin-left: 10px;
}

.instagram a {
  color: #fffde7;
  text-decoration: none;
  font-weight: 600;
}

.instagram a:hover {
  text-decoration: underline;
}

}

.logo {
  width: 48px;
  height: 48px;
  border-radius: 6px;
  object-fit: contain;
}

header h1 {
  font-size: 1.6rem;
  font-weight: 700;
}

nav a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  margin-left: 20px;
  transition: color 0.3s ease;
}

nav a:hover,
nav a.active {
  color: #ffd54f;
}

/* Container utama */
.container {
  max-width: 960px;
  margin: 30px auto;
  padding: 0 20px 60px;
}

.container h2 {
  margin-bottom: 8px;
  font-size: 1.8rem;
  color: #222;
}

.container p {
  margin-bottom: 20px;
  font-size: 1rem;
  color: #555;
}

/* Accordion tombol */
.accordion-btn {
  width: 100%;
  background: linear-gradient(90deg, #1976d2, #0d47a1);
  color: white;
  border: none;
  padding: 15px 20px;
  margin-bottom: 12px;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 8px;
  cursor: pointer;
  box-shadow: 0 4px 8px rgb(25 118 210 / 0.4);
  transition: background 0.3s ease;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.accordion-btn:hover {
  background: linear-gradient(90deg, #0d47a1, #1976d2);
}

.accordion-btn::after {
  content: '+';
  font-size: 1.5rem;
  transition: transform 0.3s ease;
}

.accordion-btn.active::after {
  content: '-';
  transform: rotate(180deg);
}

/* Konten accordion */
.accordion-content {
  background: white;
  border-radius: 0 0 8px 8px;
  padding: 20px 25px;
  margin-bottom: 20px;
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.1);
  display: none;
  max-height: 600px;
  overflow-y: auto;
}

.accordion-content.open {
  display: block;
}

/* Gambar logo UNPAM (hapus gambar 3d modul) */
.materi-img {
  display: none; /* gak dipakai */
}

/* Heading dalam materi */
.accordion-content h3 {
  color: #1565c0;
  margin-top: 15px;
  margin-bottom: 8px;
  font-size: 1.2rem;
  font-weight: 700;
}

/* Paragraph isi materi */
.accordion-content p {
  margin-bottom: 14px;
  font-size: 1rem;
  color: #444;
  line-height: 1.5;
}

/* Footer */
footer {
  text-align: center;
  padding: 15px 10px;
  background-color: #1565c0;
  color: white;
  font-weight: 600;
  position: fixed;
  bottom: 0;
  width: 100%;
}